import CryptoJS from 'crypto-js';
 
export default {
    // 随机生成密钥128位、192位、256位
    generatekey(num = 128) {
        let library = '!"#$%&()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~';
        let key = "";
        for (var i = 0, len = num / 8; i < len; i++) {
            let randomPoz = Math.floor(Math.random() * library.length);
            key += library.substring(randomPoz, randomPoz + 1);
        }
        return key;
    },
    
    //加密
    encrypt(word, keyStr) {
        keyStr = keyStr ? keyStr : 'abcdsxyzhkj12345';
        var key = CryptoJS.enc.Utf8.parse(keyStr);
        var srcs = CryptoJS.enc.Utf8.parse(word);
        var encrypted = CryptoJS.AES.encrypt(srcs, key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 });
        return encrypted.toString();
    },
    
    //解密
    decrypt(word, keyStr) {
        keyStr = keyStr ? keyStr : 'abcdsxyzhkj12345';
        var key = CryptoJS.enc.Utf8.parse(keyStr);
        var decrypt = CryptoJS.AES.decrypt(word, key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 });
        return CryptoJS.enc.Utf8.stringify(decrypt).toString();
    }
 
}